rhsa-2010_0898
Vulnerability from csaf_redhat
Published
2010-12-06 19:07
Modified
2024-11-22 03:49
Summary
Red Hat Security Advisory: kvm security update

Notes

Topic
Updated kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
Details
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel. A flaw was found in the way QEMU-KVM handled the reloading of fs and gs segment registers when they had invalid selectors. A privileged host user with access to "/dev/kvm" could use this flaw to crash the host (denial of service). (CVE-2010-3698) All KVM users should upgrade to these updated packages, which contain a backported patch to correct this issue. Note: The procedure in the Solution section must be performed before this update will take effect.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


To clipboard 

{
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      "text": "Moderate"
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    "category": "csaf_security_advisory",
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    "distribution": {
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    "notes": [
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        "category": "summary",
        "text": "Updated kvm packages that fix one security issue are now available for Red\nHat Enterprise Linux 5.\n\nThe Red Hat Security Response Team has rated this update as having moderate\nsecurity impact. A Common Vulnerability Scoring System (CVSS) base score,\nwhich gives a detailed severity rating, is available from the CVE link in\nthe References section.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for\nLinux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for\nthe standard Red Hat Enterprise Linux kernel.\n\nA flaw was found in the way QEMU-KVM handled the reloading of fs and gs\nsegment registers when they had invalid selectors. A privileged host user\nwith access to \"/dev/kvm\" could use this flaw to crash the host (denial of\nservice). (CVE-2010-3698)\n\nAll KVM users should upgrade to these updated packages, which contain a\nbackported patch to correct this issue. Note: The procedure in the Solution\nsection must be performed before this update will take effect.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
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  "vulnerabilities": [
    {
      "cve": "CVE-2010-3698",
      "discovery_date": "2010-09-27T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "639879"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The KVM implementation in the Linux kernel before 2.6.36 does not properly reload the FS and GS segment registers, which allows host OS users to cause a denial of service (host OS crash) via a KVM_RUN ioctl call in conjunction with a modified Local Descriptor Table (LDT).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kvm: invalid selector in fs/gs causes kernel panic",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "5Client-VT:kmod-kvm-0:83-164.el5_5.25.x86_64",
          "5Client-VT:kvm-0:83-164.el5_5.25.src",
          "5Client-VT:kvm-0:83-164.el5_5.25.x86_64",
          "5Client-VT:kvm-debuginfo-0:83-164.el5_5.25.x86_64",
          "5Client-VT:kvm-qemu-img-0:83-164.el5_5.25.x86_64",
          "5Client-VT:kvm-tools-0:83-164.el5_5.25.x86_64",
          "5Server-VT:kmod-kvm-0:83-164.el5_5.25.x86_64",
          "5Server-VT:kvm-0:83-164.el5_5.25.src",
          "5Server-VT:kvm-0:83-164.el5_5.25.x86_64",
          "5Server-VT:kvm-debuginfo-0:83-164.el5_5.25.x86_64",
          "5Server-VT:kvm-qemu-img-0:83-164.el5_5.25.x86_64",
          "5Server-VT:kvm-tools-0:83-164.el5_5.25.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2010-3698"
        },
        {
          "category": "external",
          "summary": "RHBZ#639879",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=639879"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2010-3698",
          "url": "https://www.cve.org/CVERecord?id=CVE-2010-3698"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2010-3698",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2010-3698"
        }
      ],
      "release_date": "2010-10-19T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2010-12-06T19:07:00+00:00",
          "details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttp://kbase.redhat.com/faq/docs/DOC-11259\n\nThe following procedure must be performed before this update will take\neffect:\n\n1) Stop all KVM guest virtual machines.\n\n2) Either reboot the hypervisor machine or, as the root user, remove (using\n\"modprobe -r [module]\") and reload (using \"modprobe [module]\") all of the\nfollowing modules which are currently running (determined using \"lsmod\"):\nkvm, ksm, kvm-intel or kvm-amd.\n\n3) Restart the KVM guest virtual machines.",
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            "5Client-VT:kvm-0:83-164.el5_5.25.x86_64",
            "5Client-VT:kvm-debuginfo-0:83-164.el5_5.25.x86_64",
            "5Client-VT:kvm-qemu-img-0:83-164.el5_5.25.x86_64",
            "5Client-VT:kvm-tools-0:83-164.el5_5.25.x86_64",
            "5Server-VT:kmod-kvm-0:83-164.el5_5.25.x86_64",
            "5Server-VT:kvm-0:83-164.el5_5.25.src",
            "5Server-VT:kvm-0:83-164.el5_5.25.x86_64",
            "5Server-VT:kvm-debuginfo-0:83-164.el5_5.25.x86_64",
            "5Server-VT:kvm-qemu-img-0:83-164.el5_5.25.x86_64",
            "5Server-VT:kvm-tools-0:83-164.el5_5.25.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2010:0898"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "SINGLE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 4.6,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:L/Au:S/C:N/I:N/A:C",
            "version": "2.0"
          },
          "products": [
            "5Client-VT:kmod-kvm-0:83-164.el5_5.25.x86_64",
            "5Client-VT:kvm-0:83-164.el5_5.25.src",
            "5Client-VT:kvm-0:83-164.el5_5.25.x86_64",
            "5Client-VT:kvm-debuginfo-0:83-164.el5_5.25.x86_64",
            "5Client-VT:kvm-qemu-img-0:83-164.el5_5.25.x86_64",
            "5Client-VT:kvm-tools-0:83-164.el5_5.25.x86_64",
            "5Server-VT:kmod-kvm-0:83-164.el5_5.25.x86_64",
            "5Server-VT:kvm-0:83-164.el5_5.25.src",
            "5Server-VT:kvm-0:83-164.el5_5.25.x86_64",
            "5Server-VT:kvm-debuginfo-0:83-164.el5_5.25.x86_64",
            "5Server-VT:kvm-qemu-img-0:83-164.el5_5.25.x86_64",
            "5Server-VT:kvm-tools-0:83-164.el5_5.25.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kvm: invalid selector in fs/gs causes kernel panic"
    }
  ]
}


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